http://shocktillyoudrop.com/news/topnews.php?id=13088
Great interview with the series creator, discussing the season finale...he provides some minor spoilers (you have to read between the lines a little bit) but is pretty tight lipped. The interview lasts an hour, but is well worth the listen.
It's amazing the lengths they went to to keep a lot of the finale twists from the cast (they used dummy scripts and had closed sets for a lot of the scenes).
I can't wait to find about this season finale twist that will be a game changer and "blow the top of our heads off"